In 1950 Crumley et al did a series of experiments where they tested the growth rate of several plants in differing amounts of D2O (heavy water or deuterium oxide). They used H2O, 33% D2O, 63% D2O, and
These are the pictures of tobacco seed growth in 99% D2O mixed with di water. Pictures are taken once every 24 hours. The higher the number in the image name, the later in time that picture was taken.
